Pore structure of exfoliated graphite- A report on a joint research project under the scientific cooperation program between NSFC and JSPS

The pore structure of exfoliated graphite was discussed on the basis of exfoliation volume, and size determination of pores among and inside the worm-like particles. In order to evaluate pore structures, new techniques were developed, which included a paraffin impregnation method for filling large spaces between the particles and fracturing across the worm-like particles for pores inside the particles, both being assisted by an image processing technique. In the first part of the present review, the pore structure of a commercially available exfoliated graphite was determined. In the second and third parts, the effects of exfoliation temperature and intercalate content are respectively discussed.